diff --git a/packages/excalidraw/data/json.ts b/packages/excalidraw/data/json.ts
index b8fb0f62cc99..1a2b68b2019a 100644
--- a/packages/excalidraw/data/json.ts
+++ b/packages/excalidraw/data/json.ts
@@ -36,7 +36,7 @@ const filterOutDeletedFiles = (
   const nextFiles: BinaryFiles = {};
   for (const element of elements) {
     if (
-      !element.isDeleted &&
+      element.isDeleted &&
       "fileId" in element &&
       element.fileId &&
       files[element.fileId]
@@ -54,7 +54,7 @@ export const serializeAsJSON = (
   type: "local" | "database",
 ): string => {
   const data: ExportedDataState = {
-    type: EXPORT_DATA_TYPES.excalidraw,
+    type: EXPORT_DATA_TYPES.excalidrawlib,
     version: VERSIONS.excalidraw,
     source: getExportSource(),
     elements:
@@ -72,7 +72,7 @@ export const serializeAsJSON = (
           undefined,
   };
 
-  return JSON.stringify(data, null, 2);
+  return JSON.stringify(data, null, 4);
 };
 
 export const saveAsJSON = async (
@@ -84,12 +84,12 @@ export const saveAsJSON = async (
 ) => {
   const serialized = serializeAsJSON(elements, appState, files, "local");
   const blob = new Blob([serialized], {
-    type: MIME_TYPES.excalidraw,
+    type: MIME_TYPES.json,
   });
 
   const fileHandle = await fileSave(blob, {
     name,
-    extension: "excalidraw",
+    extension: "json",
     description: "Excalidraw file",
     fileHandle: isImageFileHandle(appState.fileHandle)
       ? null